MCP Builder

---nname: mcp-builderndescription: Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).nlicense: Complete terms in LICENSE.txtn---nn# MCP Server Development Guidenn## OverviewnnCreate MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. The quality of an MCP server is measured by how well it enables LLMs to accomplish real-world tasks.nn---nn# Processnn## 🚀 High-Level WorkflownnCreating a high-quality MCP server involves four main phases:nn### Phase 1: Deep Research and Planningnn#### 1.1 Understand Modern MCP Designnn**API Coverage vs. Workflow Tools:**nBalance comprehensive API endpoint coverage with specialized workflow tools. Workflow tools can be more convenient for specific tasks, while comprehensive coverage gives agents flexibility to compose operations. Performance varies by client—some clients benefit from code execution that combines basic tools, while others work better with higher-level workflows. When uncertain, prioritize comprehensive API coverage.nn**Tool Naming and Discoverability:**nClear, descriptive tool names help agents find the right tools quickly. Use consistent prefixes (e.g., `github_create_issue`, `github_list_repos`) and action-oriented naming.nn**Context Managem...